Re: UDFS File System on iSeries for IFS Storage

Hello Vern, 

Thanks for the input. At least I have a better understanding of what a 
UDFS is now and why I would use it. 

Apparently when you run a backup against the block special file it still 
backs up each object  individually, so I'm not sure if that buys us any 
performance on the tape backups or not yet :-)

I saw the same thing that you did on size. The file size of the UDFS block 
file does not seem to change, even as you add IFS objects to it. 

It does actually need to be mounted over an IFS folder before using.  This 
is similar to how NFS works. 

Regards,
Richard Schoen
RJS Software Systems Inc. 

Email: richard@xxxxxxxxxxx
Web Site: http://www.rjssoft.com
Tel: (952) 898-3038
Fax: (952) 898-1781

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message: 2
date: Fri, 30 Apr 2004 10:56:15 -0500
from: Vern Hamberg <vhamberg@xxxxxxxxxxxxxxxxxxxxxxxxx>
subject: Re: UDFS File System on iSeries for IFS Storage

Hi, Richard

A UDFS is the only way to get IFS files into another ASP. The root is 
always ASP 1. So that's one reason.

I can also see advantages if you have varying search paths, with a 
mounting 
point for the UDFS in each, so you'd unmount from one and mount to the 
other. Maybe   ;-)

I don't think a UDFS is accessible until you mount it. Could be wrong. 
It's 
a *BLKSF (block special file). I mounted one and put an obect into it at 
the mount point. The attributes of the *BLKSF did not change.

Make any sense?

Vern